看起来我无法在我的脚本中访问.popover方法。除非我搞砸了，否则我应该可以从包含的Bootstrap Native（无jQuery Bootstrap）文件中访问该方法。
脚本所做的所有事情就是添加链接和理想情况下在该元素上弹出一个气泡。
这是我的代码：
清单：
{
"name": "foo",
"description": "Work in Progress",
"manifest_version": 2,
"version": "0.8",
"icons": {
"16": "icon16.png",
"48": "icon48.png",
"128": "icon128.png"
},
"permissions": [
"activeTab",
"http://*/",
"https://*/"
],
"background": {
"scripts": ["background.js"],
"persistent": false
},
"browser_action": {
"default_title": "Click me!"
}
}
背景：（在图标点击时运行）
chrome.browserAction.onClicked.addListener(function(tab) {
chrome.tabs.executeScript(tab.id, {file: "bootstrap-native.js" }, function() {
chrome.tabs.executeScript(tab.id, {file: "content_script.js"});
});
});
content_script.js:
// Handle page's frame (to allow DOM access)
var page = top.frames["TargetContent"].document;
// Reference every professor listed and modify the registration page
Array.from(page.querySelectorAll("[id^='MTG_INSTR$']") ).forEach( el => {
if (el.textContent == "Staff") {
return;
}
// For every professor found, search for RMP page
searchProfessor(el)
});
/**
* Search for professor on RMP, then pass along to pageCheck
*
* @param {Reference to prof} professorEl
*/
function searchProfessor(professorEl) {
var xhr = new XMLHttpRequest();
xhr.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
pageCheck(this.response,professorEl);
}
}
// Search RMP using CSUF + Prof Name
xhr.open('GET', 'https://www.ratemyprofessors.com/search.jsp?queryoption=HEADER&queryBy=teacherName&schoolName=california+state+university+fullerton&schoolID=&query=' + professorEl.textContent +'&_action_search=Search');
xhr.responseType = 'document';
xhr.send();
}
/**
* Verify prof's page exists and modify registration page
*
* @param {DOM Obj} page
* @param {Reference to prof} element
*/
function pageCheck(page,element){
var ProfURL = page.getElementsByClassName('listing PROFESSOR')[0].childNodes[1].href
// If the element exists, we have a hit (and the prof's page!)
if (ProfURL) {
// Link to the prof's RMP page
addAnchor(element, ProfURL);
// Access the prof's specific RMP page
var xhr1 = new XMLHttpRequest();
// Create box to display prof info on hover
xhr1.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
addTooltip(this.response,element);
}
}
xhr1.open('GET', ProfURL);
xhr1.responseType = 'document';
xhr1.send();
}
}
function addTooltip(profPage,profElement) {
profElement.popover({title: "Header", content: "Blabla", trigger: "click"});
var name = profElement.textContent;
var grade = profPage.getElementsByClassName('grade')[0].textContent;
var difficulty = profPage.getElementsByClassName('grade')[2].textContent;
var ratings = profPage.getElementsByClassName('table-toggle rating-count active')[0].textContent;
ratings = ratings.trim();
}
/**
* Assign hyperlink to element
*
* @param {Element} wrapper
* @param {String} URL
*/
function addAnchor (wrapper, URL) {
var a = document.createElement('a');
a.href = URL;
a.textContent = wrapper.textContent;
// Opens in new window/tab
a.setAttribute('target', '_blank');
wrapper.replaceChild(a, wrapper.firstChild);
}
Bootstrap Native 的链接：
https://github.com/thednp/bootstrap.native
和
http://thednp.github.io/bootstrap.native/
错误：
content_script.js:75 Uncaught TypeError: profElement.popover is not a function
at addTooltip (content_script.js:75)
at XMLHttpRequest.xhr1.onreadystatechange (content_script.js:61)
bootstrap-native 是你从他们的 bootstrap native/dist/ 文件夹下载的 68kb 文件。我认为这可能是问题所在，因为当我将一个变量放入这个文件中时，它可以在内容脚本中访问，但不能在方法中访问。
对于这一切我都是新手，也许我拥有的 bootstrap native 文件不是正确的文件。或者我没有正确调用方法，但这不应该导致我出现这个错误。
content_script.js之前包含库，可以通过 Chrome 扩展 API、require 或您选择的任何其他方式实现。 - thednp